<p>
Mark the users you want to add to the challenge.
</p>
<?php
	echo $submit_result . PHP_EOL;
	echo form_open("c_challenge/participants/$challenge_id") . PHP_EOL;
	echo $user_table;
?>
<p>
<?php echo form_submit('submit_changes', 'Submit changes'); ?>
</p>
</form>
